Service Data Transmission Method And Apparatus

Abstract

A service data transmission method and an apparatus are disclosed to reduce a data transmission latency. An example method includes: obtaining, by a first network device, first configuration information, where the first configuration information includes a first identifier and a first transmission mode corresponding to the first identifier, and the first transmission mode corresponding to the first identifier is a mode in which transmission is performed by using an access network; receiving, by the first network device, first service data and a second identifier that are sent by a terminal; determining, by the first network device based on the first identifier and the second identifier, that a transmission mode of the first service data is the first transmission mode; and transmitting, by the first network device, the first service data based on the first transmission mode.

What is claimed is: 
     
         1 . A service data transmission method, comprising:
 obtaining, by a first network device, first configuration information, wherein the first configuration information comprises a first identifier and a first transmission mode corresponding to the first identifier, and the first transmission mode corresponding to the first identifier is a mode in which transmission is performed by using an access network;   receiving, by the first network device, first service data and a second identifier that are sent by a terminal;   determining, by the first network device based on the first identifier and the second identifier, that a transmission mode of the first service data is the first transmission mode; and   transmitting, by the first network device, the first service data based on the first transmission mode.   
     
     
         2 . The method according to  claim 1 , wherein the obtaining, by a first network device, first configuration information comprises:
 obtaining, by the first network device, preconfigured information, wherein the preconfigured information comprises the first configuration information; or   receiving, by the first network device, control signaling sent by a second network device, wherein the control signaling carries the first configuration information.   
     
     
         3 . The method according to  claim 1 , wherein
 the first identifier is a data radio bearer identifier between the terminal and the first network device, a flow identifier of a service flow to which the first service data belongs, or a specific field in the flow identifier or the data radio bearer identifier; and   the second identifier is the data radio bearer identifier between the terminal and the first network device, the flow identifier of the service flow to which the first service data belongs, or the specific field in the flow identifier or the data radio bearer identifier, wherein   the first identifier and the second identifier are identifiers of a same type or of different types.   
     
     
         4 . The method according to  claim 1 , wherein the transmitting, by the first network device, the first service data based on the first transmission mode comprises:
 determining, by the first network device, a downlink transmission mode of second service data based on a service type of the first service data, wherein the second service data is service data obtained by converting the first service data to downlink data when the first service data is transmitted by using the access network, and the downlink transmission mode is a downlink broadcast mode; and   transmitting, by the first network device, the second service data based on the determined downlink transmission mode.   
     
     
         5 . The method according to  claim 4 , wherein the first service data further carries quality of service information, and the method further comprises:
 determining, by the first network device based on the quality of service information and uplink overheads for transmitting the first service data, downlink quality of service information for transmitting the second service data; and   selecting, by the first network device, a downlink bearer for the second service data based on the downlink quality of service information.   
     
     
         6 . The method according to  claim 4 , wherein the first network device determines that the downlink transmission mode of the second service data is the downlink broadcast mode, the first configuration information further comprises a first broadcast indication and a downlink broadcast mode corresponding to the first broadcast indication; and the method further comprises:
 receiving, by the first network device, a second broadcast indication sent by the terminal; and   determining, by the first network device, the downlink broadcast mode of the second service data based on the first broadcast indication, the downlink broadcast mode, and the second broadcast indication, wherein the downlink broadcast mode comprises broadcasting in a cell in which the first network device is located, or transmitting the second service data to a cell in which a neighboring first network device is located for broadcasting, or broadcasting in a cell in which the first network device is located and transmitting the second service data to a cell in which a neighboring first network device is located for broadcasting.   
     
     
         7 . A service data transmission method, comprising:
 sending, by a terminal, first service data and a second identifier to a first network device, wherein the second identifier is used by the first network device to determine a transmission mode of the first service data; and   receiving, by the terminal, second service data transmitted by the first network device in a first transmission mode, wherein the first transmission mode is determined based on the second identifier and is a mode in which transmission is performed by using an access network, and the second service data is service data obtained by converting the first service data to downlink data when the first service data is transmitted by using the access network.   
     
     
         8 . The method according to  claim 7 , wherein the second identifier is a data radio bearer identifier between the terminal and the first network device, a flow identifier of a service flow to which the first service data belongs, or a specific field in the flow identifier or the data radio bearer identifier. 
     
     
         9 . The method according to  claim 7 , wherein the method further comprises:
 sending, by the terminal, a second broadcast indication to the first network device, wherein the second broadcast indication is used by the first network device to determine a downlink broadcast mode of the second service data, the downlink broadcast mode comprises broadcasting in a cell in which the first network device is located, or transmitting the second service data to a cell in which a neighboring first network device is located for broadcasting, or broadcasting in a cell in which the first network device is located and transmitting the second service data to a cell in which a neighboring first network device is located for broadcasting.   
     
     
         10 . A network device, comprising:
 a processor, configured to obtain first configuration information, wherein the first configuration information comprises a first identifier and a first transmission mode corresponding to the first identifier, and the first transmission mode corresponding to the first identifier is a mode in which transmission is performed by using an access network; and   a receiver, configured to receive first service data and a second identifier that are sent by a terminal, wherein   the processor is further configured to: determine, based on the first identifier and the second identifier, that a transmission mode of the first service data is the first transmission mode; and transmit the first service data based on the first transmission mode.   
     
     
         11 . The network device according to  claim 10 , wherein
 the processor is further configured to:   obtain preconfigured information, wherein the preconfigured information comprises the first configuration information; or   receive, by using the receiver, control signaling sent by a second network device, wherein the control signaling carries the first configuration information.   
     
     
         12 . The network device according to  claim 10 , wherein
 the first identifier is a data radio bearer identifier between the terminal and a first network device, a flow identifier of a service flow to which the first service data belongs, or a specific field in the flow identifier or the data radio bearer identifier; and   the second identifier is the data radio bearer identifier between the terminal and the first network device, the flow identifier of the service flow to which the first service data belongs, or the specific field in the flow identifier or the data radio bearer identifier, wherein   the first identifier and the second identifier are identifiers of a same type or of different types.   
     
     
         13 . The network device according to  claim 10 , wherein the processor is configured to:
 determine a downlink transmission mode of second service data based on a service type of the first service data, wherein the second service data is service data obtained by converting the first service data to downlink data when the first service data is transmitted by using the access network, and the downlink transmission mode is a downlink broadcast mode; and   wherein the network device comprises a transmitter that is configured to transmit the second service data based on the determined downlink transmission mode.   
     
     
         14 . The network device according to  claim 13 , wherein the first service data further carries quality of service information, and the processor is further configured to:
 determine, based on the quality of service information and uplink overheads for transmitting the first service data, downlink quality of service information for transmitting the second service data; and   select a downlink bearer for the second service data based on the downlink quality of service information.   
     
     
         15 . The network device according to  claim 13 , wherein the processor is configured to:
 determine that the downlink transmission mode of the second service data is the downlink broadcast mode, wherein the first configuration information further comprises a first broadcast indication and a downlink broadcast mode corresponding to the first broadcast indication; and   the receiver is further configured to receive a second broadcast indication sent by the terminal; and   the processor is further configured to determine a downlink broadcast mode of the second service data based on the first broadcast indication, the downlink broadcast mode, and the second broadcast indication, wherein the downlink broadcast mode comprises broadcasting in a cell in which the network device is located, or transmitting the second service data to a cell in which a neighboring network device is located, or broadcasting in a cell in which the network device is located and transmitting the second service data to a cell in which a neighboring network device is located.   
     
     
         16 . A terminal, comprising:
 a transmitter, configured to send first service data and a second identifier to a first network device, wherein the second identifier is used by the first network device to determine a transmission mode of the first service data; and   a receiver, configured to receive second service data transmitted by the first network device in a first transmission mode, wherein the first transmission mode is determined based on the second identifier and is a mode in which transmission is performed by using an access network, and the second service data is service data obtained by converting the first service data to downlink data when the first service data is transmitted by using the access network.   
     
     
         17 . The terminal according to  claim 16 , wherein the second identifier is a data radio bearer identifier between the terminal and the first network device, a flow identifier of a service flow to which the first service data belongs, or a specific field in the flow identifier or the data radio bearer identifier. 
     
     
         18 . The terminal according to  claim 16 , wherein the transmitter is further configured to:
 send a second broadcast indication to the first network device, wherein the second broadcast indication is used by the first network device to determine a downlink broadcast mode of the second service data, the downlink broadcast mode comprises broadcasting in a cell in which the first network device is located, or transmitting the second service data to a cell in which a neighboring first network device is located for broadcasting, or broadcasting in a cell in which the first network device is located and transmitting the second service data to a cell in which a neighboring first network device is located for broadcasting.